Technical information
Table Of Contents
- GoMobile Cover
- SGC – The SSB People
- Go Mobile at 500 Watts
- T a b l e o f C o n t e n t s
- I n t r o d u c t i o n
- C h a p t e r 1 C h a n g e s i n M o b i l e R a d i o
- C h a p t e r 2 O r i e n t i n g Y o u r s e l f t o 5 0 0 W a t t s
- C h a p t e r 3 DCP o w e r S u p p l y S y s t e m f o r a M o b i l e I n s t a l l a t i o n
- C h a p t e r 4 A n t e n n a s a n d G r o u n d s
- C h a p t e r 5 N o i s e S u p p r e s s i o n a n d S h o c k -M o u n t i n g
- C h a p t e r 6 I n s t a l l a t i o n P r o c e d u r e s
- C h a p t e r 7 I n s t a l l a t i o n V a r i a b l e s
- C h a p t e r 8 G o i n g M o b i l e a t 1 5 0 W a t t s
- Appendix A — QMS S y s t e m
- A p p e n d i x B — S e l e c t i o n o f E q u i p m e n t
- A p p e n d i x C — T e s t D a t a
- It all Adds Up
11
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259-7331
E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.com
© 1997 SGC Inc.
DC Power Supply System
for a Mobile Installation
Because your vehicle‘s electrical system has a limited capaci-
ty, it is important to understand the power requirements of
your mobile radio installation. Inadequate power to the sys-
tem can render the best radio equipment useless.
Let’s first take a look at the battery and charging system on a
later model vehicle. Typical systems have a lead acid battery
that, of course, is used to start the engine and that takes up
the electrical slack at low engine speeds when the alternator
may not provide enough power to operate the electrical
accessories.
Measuring Your Vehicle’s Requirements
Your vehicle’s accessories typically draw this much DC cur-
rent:
Headlight system 15 amps
Heater fan 7 amps
Windshield Wiper 6 amps
Air Conditioner 15 amps or more
Electric defroster 10 amps or more
Radio-Stereo 5 amps
Starting motor 200 amps or more
As you can see, the maximum likely wintertime current draw
in normal vehicle operation is around 45 to 55 amps. The
exception is the starter motor, which draws very high cur-
rent but for only short periods. Today’s alternators can easily
provide this much current, and often much more. (Alternator
capacity is usually indicated on a plate attached to the alter-
nator itself.)
Chapter 3